Feed-water heater for steam-boilers



L t B 6 h S V w. G e h s 3 T S E B U T (No Model.)

FEED WATER HEATER FOR STEAM BOILERS.

Patented Aug. 15,1893.

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No. 503,521. Patented Aug. 15, 1893.

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T. 0. BEST. FEED WATER HEATER POE STEAM BOILERS. No. 503,521. v Patented'Aug. 15, 1893.

I h i v Q 0 3% E I E 2 .6 i V w Q w EEMW. WE M UNITED STATES PATENT OFFICE.

THOMAS (1. BEST, OF CHICAGO, ILLINOIS.

FEED-WATER HEATER FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 503,521, dated August 15, 1893.

Application filed April 18, 1892. Serial No. 429,560- (No model.)

To all whom it may concern:

Be it known that I, THOMAS 0. BEST, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Feedater Heaters for Steam-Boilers, of which the following is a specification.

My invention relates to improvements infeed water heaters for steam boilers, and has for its object the more certain and reliable introduction of heated water to supply the requirements of the steam boiler, the creation of aconstant circulation of heated water from and to the boiler and an increase in the steam generating power of the boiler. I attain these objects by means of the mechanism illustrated in the accompanying drawings in which like parts are represented by similar reference letters and numerals.

Figure 1 represents a side elevation of my invention in connection with a steam boiler. Fig. 2 represents a vertical longitudinal section of a steam boiler with the several parts of my invention shown in place. Fig. 3 is a sectional detail view of the spiral connection employed as a feature of my invention. Fig. 4, is a sectional view, of portions of my invention in place in a steam boiler, taken on the lines as-aa Fig. l.

I have heretofore filed and now have pending in the United States Patent Office, applications for patent for various improvements in steam boilers, the serial numbers of which are respectively 367,922 and 417,420. In these applications I have shown certain parts and features of my invention but have made no claim thereto, nor do I now make claim to any invention or inventions described and claimed in either of said applications.

It is well known that steam boilers are constructed in various forms; some with furnaces within the boiler located at one end, a combustion chamber located within the boiler, or an. extension of the boiler shell atthe other end; and fines connecting the furnace chamber with the combustion chamber. In other instances the boiler instead of being provided with such interior chambers is set up and supported in inclosing walls, the furnace being located beneath the boiler and a combustion chamber constructed at the rear of the boiler. My invention is capable of being applied to all combinations and arrangements of boilers and their furnaces and combustion chambers.

In the drawings accompanying the specification, I have illustrated my invention in connection with a steam boiler provided with a furnace chamber within the boiler at one end and a combustion chamber within the extension of the boiler shell at the other end, the two chambers being connected by flues. The coil M to be hereinafter described is illustrated as located within the combustion chamber, and swung in bearings cut in the extension of the boiler shell so that the coil may be readily rocked or lifted up or entirely removed. WVhere the boiler is located in inclosing walls and the furnace or combustion chamber is exterior to the boiler, the coil M may be located in either the furnace or combustion chamber, and proper bearing provided in the walls or other supports; one of the int portant features of my invention consisting of the introduction of a coil into the main feed water pipe and locating it in a heating chamber in connection with the boiler and hanging or suspending it so that it may be easily lifted on its hearings or entirely removed.

It is also well known that there are many well known means and devices for forcing water from the water supply into and through the main feed water pipe, either with or without steam, such as inspirators, injectors, (be. I make no claim to the injector with which I have illustrated my invention in the drawings, as any of the well known means for causing the water from the supply to flow into the main feed water pipe may be employed; and, for the purposes of my invention, are equivalents.

Letter A represents the usual shell of a steam boiler provided with a furnace, a combustion chamber, fines, 820.

B represents the smoke stack and O the steam dome.

D represents a steam pipe which entering the top of the steam boiler and being provided with a stop cock 8 is connected with an injector E as shown.

F is a water supply pipe connected as is usual with the source of water supply and at the other end connected with the injector.

The pipe G is also connected with said injector, and, proceeding externally to the boiler, passes through the shell of the boiler.

ral connection 12; also with a stop cock 2. By

means of a T-coupling or union the pipe Gris connected with a pipe H which extends upward and enters the steamboiler near the top of the latter. Pipe H is provided with the stop cock 5. The arm 13 of the spiral connection 12 is connected with a circulating pipe 18 provided with a stop cock 1, and, continuing,

enters the boiler at a point 15, below the water line. The pipe G after entering the com bustion chamber may be coiled in any desirable form most advantageous for receiving the heat of the furnace or combustion chamber. It maybe simply passed through the furnace chamber or combustion chamber without being coiled or extended in length to the point where it enters the boiler. It is essential only that it shall be exposed to the heat in order that the water passing through it and into the boiler shall be heated as nearly as possible to the same degree as that within the boiler. It is evident that the pipe G may be introduced into theshell of the boiler at either end thereof, and that its steam and water connections external to the boiler, including the injector, may be located and arranged accordingly. But I prefer to introduce pipe G into the combustion chamber as shown in Figs. 1, 2 and 3 and duplicate or multiply it in the form of a coil as shown so as to form a partial backing for the combustion CllEtllb' ber located where it will receive the direct force and effect of the heat proceeding from the flues. I accomplish this by a union 2O where the pipe G is bent to enter the shell of the boiler and thereby making connection with the coil M. The part of pipe G marked 21 constitutes a journal and rests in a hearing made bycutting the proper opening in the shell of the boiler. The coil is constructed of a bifurcated or multiplied pipe extending back and forth across the combustion chamber and at 23 is connected with the single pipe J which passes out of the boilor shell at 24. The coil of multiplied pipe is provided with a projection H which constitutes ajournal and rests in a bearing out in the shell of the boiler. The pipe J may be made to enter the boiler at any point but it is preferable that the point of entrance should be nearthe end and bottom of the boiler, at a point either within or without the chamber in which the coil M is located, but I prefer to have the pipe J pass out of the boiler shell through an opening 24 in the bottom thereof, and then by means of a union 25, to unite with the pipe J provided with a stop cock 7, and to introduce the pipe J into the boiler at a point at the bottom and near the end of the boiler. By this arrangement the constant pipe G and increases its heat.

passage of the heated water at the point 26 will aid materially in creating and keeping up a circulation of the water in the boiler which will carry the sediment and deposit toward the blow off pipe located at or near'the opposite end of the boiler'and thereby keep the bottom of the boiler clean. The spiral connection-12 is provided with a spiral core 17, rigidly held within the bore of the upper passage. By means of this construction the water passing through the connection is given a rotatory motion and agitated along the entire length of the pipe and coil and the deposit of sediment thereby prevented.

The operation of myinvention is'as follows:

When the injector E forces the cold. water into and along the pipe G it is heated to some extent and commingled with steam which is fed through the injector by the pipe D. The use and operation of the check valves 8 and 11 in preventing the backfiow of the water are well known and need not be more particulary explained. The pump connection 9 is out off from its supply when the injector is in operation so that no water can escape through that connection which is used only when the injector and its connections are out of order or for any cause are not operated. The water is forced along through the spiral connection 12 which operates as a pump to draw hot water from the boiler through the pipe 18 which intermingles with the water in 5 in pipe H is closed as is also stop cock 4. in pipe J. The water then passes into the pipe or multiplied coil M where its motion is retarded owing to the increased capacity of the coil, and while thus retarded and moving slowly it is exposed to the intense heat generated in the furnace and is heated to practically the same degree as the water in the boiler. It passes finally into the pipes J and J and thence into the boiler at such point as may be desired. In this manner the quantity of water supplied can be regulated, the water heated, the circulation of the water in the boiler increased and the coil operates as a steam generator and to that extent increases the heating surface of the boiler. By the construction and arrangement of pipes and stop cooks the coil M may be easily cleansed or blown out. Thus by closing stop cocks 2 and 3, and opening stop cocks land 5 the steam passing into the coil through the pipe H will expel the Water and the coil may be thoroughly blown out.

Instead of opening stop cook t and directing the blow out through it, it may be closed and stop cocks 3 and 7 may be opened, and the water and sediment blown out through the point 7. It is also evident that by closing the stop cocks 3, 2 and 5, and releasing the union 25, the coil M may be lifted or rocked up, on its journals, and inspected; and access to the boiler plate and lines permitted; or by releasing the union 20 the coil may be entirely removed. In case of derangement or The stop cookstoppage of the coil M or any of its connections, the stop cock 2 may be closed and the boiler may be fed by water forced through the main feed pipe G and the circulating pipe 18.

It is evident that there may be many variations and modifications in the construction and arrangement of parts in my invention without departing from the spirit thereof and I do not limit myself to the specific construction and arrangement shown.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. The combination of a steam boiler provided with a heating or combustion chamber; with a main feed water pipe and means for forcing water and steam or either into said pipe; said pipe extended into said chamber; that portion of said main feed water pipe located within said chamber formed into a coil which is provided with trunnion bearings for said journals or trunnions located and supported in the walls of said chamber; said main feed water pipe extending from said coil and introduced into the steam boiler at a point in the lower portion of the boiler; all substantially as shown.

2. A feed water heater capable of connec tion with means for forcing water or steam or either into it, consisting of a pipe a coil of pipe provided with journals or trunnions capable of engaging in bearings located in the furnace or combustion chamber of a steam boiler, and a pipe extending from said coil and capable of introduction into such steam boiler at or near the lower portion thereof; all substantially as shown.

3. A feed water heater capable of connection with means for forcing water and steam or either into it, consisting of a pipe a coil of duplicated or multiplied pipes said coil provided with journals or trunnions capable of engagement and support in bearings located in the walls or other supports of a heating chamber of a steam boiler; and a pipe connected with the lower part of said coil and extended, and capable of introduction into the steam boiler at or near the lower portion thereof; all substantially as shown.

l. A feed water heater capable of connection with means for forcing water and steam or either into it, consisting of a main feed pipe provided with a stop cock 2 a steam pipe l-I arranged to be introduced into the steam chamber of the boiler and having a stop cock 5; a coil of pipe provided with journals or trunnions capable of engagement and support in bearings located in the walls of the heating chamber of the boiler; a second pipe connecting with the lower part of said coil and provided with stop cocks 3 and 4E and extended so as to be capable of being introduced into the boiler at or near the lower portion thereof; all substantially as shown.

5. A feed water heater capable of connection with means for forcing water and steam or either into it consisting of a main pipe provided with two check valves and a pump connection intermediate said check valves and with a suction coupling; a circulating pipe connected with said suction coupling provided with a stop-cock and capable of being introduced into the steam boiler at a point below the water line; a coil of duplicated or multiplied pipes provided with journals or trunnions capable of engaging and being supported in bearings located in the walls or supports of the heating chamber of said steam boiler; and a pipe J connected with the lower end of said coil and provided with the stop cock 4 and connected with the pipe J having the stop cock 3, and capable of being introduced into the boiler at a point near the lower portion thereof; all substantially as shown.

6. In a feed water heater the combination of a main feed water pipe with a suction coupling provided in its horizontal branch with a spiral core and a circulating pipe c011- nected with the inclined branch thereof and extended so as to be capable of entering the steam boiler at a point below the water line; said main feed water pipe being extended and connected with a coil capable of support in the walls of the heating chamber and thence extended and capable of being introduced into said boiler at or near the lower portion thereof; all substantially as shown.

7. In a feed water heater for steam boilers a suction coupling provided with a spiral core rigidly held in the bore of the main branch thereof, the inclined branch thereof capable of connection with a pipe entering the boiler at a point below the water line; all substantially as shown.

8. In a feed water heater leading from an ejector, and provided with a stop cock 2; a coil connected with said pipe capable of introduction and support, in the heating chamber of the boiler, said coil being provided with the pipes J J capable of entering the boiler at the lower portion thereof, and being provided with an extension having the stop-cock 4, and the stop cock 3; the steam pipe I-I connecting with said feed water pipe at 11, and provided with a stop-cock 5; whereby at any time the feeding of water through said coil may be arrested, and by means of the steam pipe H, the water in said coil and pipes may be blown out and the sediment and deposit therein removed, all substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two witnesses.

THOMAS 0. BEST.

Witnesses:

FRANK T. BROWN, J. LAWRENCE GERRY. 

